code: def test_default_format(self, lazy):
      reader = SequenceTaggingDatasetReader(lazy=lazy)
      instances = reader.read(
          AllenNlpTestCase.FIXTURES_ROOT
          / "data"
          / "sequence_tagging.tsv"
      )
      instances = ensure_list(instances)
  
      assert len(instances) == 4
      fields = instances[0].fields
      assert [t.text for t in fields["tokens"].tokens] == [
          "cats",
          "are",
          "animals",
          ".",
      ]
      assert fields["tags"].labels == ["N", "V", "N", "N"]
      fields = instances[1].fields
      assert [t.text for t in fields["tokens"].tokens] == [
          "dogs",
          "are",
          "animals",
          ".",
      ]
      assert fields["tags"].labels == ["N", "V", "N", "N"]
      fields = instances[2].fields
      assert [t.text for t in fields["tokens"].tokens] == [
          "snakes",
          "are",
          "animals",
          ".",
      ]
      assert fields["tags"].labels == ["N", "V", "N", "N"]
      fields = instances[3].fields
      assert [t.text for t in fields["tokens"].tokens] == [
          "birds",
          "are",
          "animals",
          ".",
      ]
      assert fields["tags"].labels == ["N", "V", "N", "N"]
  
file_path: magnitude/pymagnitude/third_party/allennlp/tests/data/dataset_readers/sequence_tagging_test.py
imports: from __future__ import division
  from __future__ import absolute_import
  import pytest
  from allennlp.data.dataset_readers import SequenceTaggingDatasetReader
  from allennlp.common.util import ensure_list
  from allennlp.common.testing import AllenNlpTestCase
label_desc: Use image node_id 1 for calling the TestSequenceTaggingDatasetReader obj's underlying member method code with example usage: obj.test_default_format(lazy) without return types